cl: funcOf; use gogen/packages.Importer

cl/_testdata/_importpkg/in.go

@@ -0,0 +1,9 @@
+package main
+
+import "github.com/goplus/llgo/cl/internal/stdio"
+
+var hello = [...]int8{'H', 'e', 'l', 'l', 'o', '\n', 0}
+
+func main() {
+	stdio.Printf(&hello[0])
+}

cl/compile.go

@@ -59,14 +59,15 @@ const (
 )
 
 func funcKind(vfn ssa.Value) int {
-	if fn, ok := vfn.(*ssa.Function); ok {
-		n := len(fn.Params)
+	if fn, ok := vfn.(*ssa.Function); ok && fn.Signature.Recv() == nil {
+		params := fn.Signature.Params()
+		n := params.Len()
 		if n == 0 {
 			if fn.Name() == "init" && fn.Pkg.Pkg.Path() == "unsafe" {
 				return fnUnsafeInit
 			}
 		} else {
-			last := fn.Params[n-1]
+			last := params.At(n - 1)
 			if last.Name() == llssa.NameValist {
 				return fnHasVArg
 			}
@@ -135,6 +136,15 @@ func (p *context) funcName(fn *ssa.Function) string {
 	return name
 }
 
+func (p *context) funcOf(fn *ssa.Function) llssa.Function {
+	pkg := p.pkg
+	name := p.funcName(fn)
+	if ret := pkg.FuncOf(name); ret != nil {
+		return ret
+	}
+	return pkg.NewFunc(name, fn.Signature) // TODO: support linkname
+}
+
 func (p *context) compileType(pkg llssa.Package, member *ssa.Type) {
 	panic("todo")
 }
@@ -279,10 +289,7 @@ func (p *context) compileValue(b llssa.Builder, v ssa.Value) llssa.Expr {
 			}
 		}
 	case *ssa.Function:
-		if v.Pkg != p.goPkg {
-			panic("todo")
-		}
-		fn := p.pkg.FuncOf(p.funcName(v))
+		fn := p.funcOf(v)
 		return fn.Expr
 	case *ssa.Global:
 		if v.Pkg != p.goPkg {

cl/compile_test.go

@@ -18,7 +18,6 @@ package cl
 
 import (
 	"go/ast"
-	"go/importer"
 	"go/parser"
 	"go/token"
 	"go/types"
@@ -28,9 +27,11 @@ import (
 	"strings"
 	"testing"
 
-	llssa "github.com/goplus/llgo/ssa"
+	"github.com/goplus/gogen/packages"
 	"golang.org/x/tools/go/ssa"
 	"golang.org/x/tools/go/ssa/ssautil"
+
+	llssa "github.com/goplus/llgo/ssa"
 )
 
 func TestFromTestdata(t *testing.T) {
@@ -88,8 +89,9 @@ func testCompileEx(t *testing.T, src any, fname, expected string) {
 	files := []*ast.File{f}
 	name := f.Name.Name
 	pkg := types.NewPackage(name, name)
+	imp := packages.NewImporter(fset)
 	foo, _, err := ssautil.BuildPackage(
-		&types.Config{Importer: importer.Default()}, fset, pkg, files, ssa.SanityCheckFunctions)
+		&types.Config{Importer: imp}, fset, pkg, files, ssa.SanityCheckFunctions)
 	if err != nil {
 		t.Fatal("BuildPackage failed:", err)
 	}

cl/internal/stdio/printf.go

@@ -2,5 +2,5 @@ package stdio
 
 import _ "unsafe"
 
-//go:linkname printf printf
-func printf(format *int8, __llgo_va_list ...any)
+//go:linkname Printf printf
+func Printf(format *int8, __llgo_va_list ...any)